Include interfaces for runtime hints scan.

Signed-off-by: Olga Maciaszek-Sharma <olga.maciaszek-sharma@broadcom.com>

Author: OlgaMaciaszek

spring-cloud-gateway-server-mvc/src/main/java/org/springframework/cloud/gateway/server/mvc/config/GatewayMvcRuntimeHintsProcessor.java

@@ -29,6 +29,7 @@
 import org.springframework.aot.hint.MemberCategory;
 import org.springframework.aot.hint.ReflectionHints;
 import org.springframework.aot.hint.TypeReference;
+import org.springframework.beans.factory.annotation.AnnotatedBeanDefinition;
 import org.springframework.beans.factory.aot.BeanFactoryInitializationAotContribution;
 import org.springframework.beans.factory.aot.BeanFactoryInitializationAotProcessor;
 import org.springframework.beans.factory.config.BeanDefinition;
@@ -84,7 +85,7 @@ public BeanFactoryInitializationAotContribution processAheadOfTime(ConfigurableL
 
 	private static Set<Class<?>> getTypesToRegister(String packageName) {
 		Set<Class<?>> classesToAdd = new HashSet<>();
-		ClassPathScanningCandidateComponentProvider provider = new ClassPathScanningCandidateComponentProvider(false);
+		ClassPathScanningCandidateComponentProvider provider = buildProvider();
 		provider.addIncludeFilter(new AssignableTypeFilter(Object.class));
 		Set<BeanDefinition> components = provider.findCandidateComponents(packageName);
 		for (BeanDefinition component : components) {
@@ -104,6 +105,17 @@ private static Set<Class<?>> getTypesToRegister(String packageName) {
 		return classesToAdd;
 	}
 
+	private static ClassPathScanningCandidateComponentProvider buildProvider() {
+		return new ClassPathScanningCandidateComponentProvider(false) {
+			@SuppressWarnings("NullableProblems")
+			@Override
+			protected boolean isCandidateComponent(AnnotatedBeanDefinition beanDefinition) {
+				// Include both concrete classes and interfaces
+				return beanDefinition.getMetadata().isIndependent() && !beanDefinition.getMetadata().isAnnotation();
+			}
+		};
+	}
+
 	private static boolean shouldRegisterClass(Class<?> clazz) {
 		Set<String> conditionClasses = beansConditionalOnClasses.getOrDefault(clazz.getName(), Collections.emptySet());
 		for (String conditionClass : conditionClasses) {